That was likely true of models from the mid-2010s, but based on what I've seen of Hugh Jeffrey's work, most modern, high-end smartphones are held together with

That was likely true of models from the mid-2010s, but based on what I've seen of Hugh Jeffrey's work, most modern, high-end smartphones are held together with glue and require the disconnection of multiple fragile ribbon cables to replace the battery. It's a daunting task even for someone with experience working on computer components.